Solution Processed Solar Cells

Prof. Wenzhi Li

Department of Physics, FIU, USA

王雪林 教授

2014-07-02 15:30

物理学院离子束报告厅

High efficient and cost-effective solar cells are of paramount importance to harvest abundant and clean solar energy. Among various techniques, solution processed solar cells have emerged as the promising candidates for the next generation of solar cells. In this talk, three types of solution processed solar cells, inorganic (quantum dot sensitized solar cells, copper zinc tin sulfide solar cells), organic (polymer, small molecule), and hybrid (dye sensitized solar cells, perovskite solar cell), will be discussed for their architectures and working principles. The management of the discrepancy between optical absorption scale (micrometer) and charge transport scale (nanometer) are crucial for the device efficiency. Common approaches adopted to address this problem through rational interface engineering will be discussed.

The Li group’s research is on the study of electron field emission property of carbon nanotubes, bio-electrochemical properties of carbon nanotube based biosensors, carbon nanotube composites for lithium ion battery application, dye-sensitized and perovskite-based solar cells, and thermoelectric nanomaterials. (website link:http://physics.fiu.edu/faculty/wenzhi-li/) The main research interests include:

1.Synthesis and characterization of novel nanomaterials including semiconducting nanowires, nanotubes, and nanodots.

2. Study on electronic transport, optical and mechanical properties of low dimensional nanomaterials.

3. Applications of nanomaterials in structural and functional composites and in energy storage.

4. Application of nanoscience to biology and medicine.

5. Integration of MEMS technology, fabrication of nanoelectrodes and nanoelectronic devices.

Below is the list of papers published by the group in recent years.

1.Qingmei Su, Gaohui Du, Jun Zhang, YijunZhong, Bingshe Xu, Yuehai Yang, Suman Neupane, Mengjin Yang, and Wenzhi Li*, “In Situ Transmission Electron Microscopy Observation of the Electrochemical Sodiation of Individual Co9S8–Filled CNT in Nanoscale Sodium Ion Battery”, ACS Nano, 2014, DOI: 10.1021/nn500194q.

2.Kamal Kadel, Wenzhi Li*, “Solvothermal synthesis and characterization of unfilled and Yb-filled thermoelectric cobalt antimony”, Crystal Research and Technology 49 (2–3) (2014) 135–141. DOI 10.1002/crat.201300330.

3.Qingmei Su, Gaohui Du, Jun Zhang, YijunZhong, Bingshe Xu, Yuehai Yang, Suman Neupane, Kamal Kadel, and Wenzhi Li*, “In situ TEM investigation of the electrochemical lithiation–delithiation of individual Co9S8/Co–filled carbon nanotubes”, ACS Nano 7 (12) (2013) 11379–11387.DOI: 10.1021/nn405254n.

4.Mengjin Yang, Suman Neupane, Xuewen Wang, Jin He, Wenzhi Li*, Neizh Pala, “Multiple Step Growth of Single Crystalline Rutile Nanorods with the Assistance of Self-Assembled Monolayer for Dye Sensitized Solar Cells”, ACS Applied Materials & Interfaces 5 (2013) 9809.

5.Yuping Shan, Purushottam Tiwari, PadminiKrishnakumar, Ivan Vlassiouk, Wenzhi Li, Xuewen wang, Yesim Darici, Stuart Lindsay, Hongda Wang, S. Smirnov, Jin He, “Chemically modified graphenenanopore for protein translocation", Nanotechnology 24 (2013) 495102.http://dx.doi.org/10.1088/0957-4484/24/49/495102.

6.Suman Neupane, Yuehai Yang, Wenzhi Li*, YihuaGao, “Synthesis and enhanced electron field emission of vertically aligned carbon nanotubes on stainless steel substrate”, Journal of Nanoscience Letters 4:14 (2013).http://www.cognizure.com/jnl.aspx?b=1

7.Guohai Chen, Suman Neupane, Wenzhi Li*, Lina Chen, Jiandi Zhang, “Improved field emission characteristics of vertically aligned multiwalled carbon nanotubes after NH3 plasma treatment” Carbon 52 (2013) 468–475.

8.G.H. Chen, S. Neupane, W.Z. Li*,“Electron field emission properties of vertically aligned carbon nanotube point emitters”, Diamond and Related Materials 25, 134(2012).

9.Yanli Zhao, Wenzhi Li*, Electrical Transport Properties of Multi-layered Single-walled Carbon Nanotube Films”,Journal of Nanotechnology, (2012) DOI: 10.1155/2012/601582

10.Charles de las Casas, Wenzhi Li*, “A Review of Application of Carbon Nanotubes for Lithium Ion Battery Anode Material”, Journal of Power Sources 208, 74 (2012)

Suman Neupane, Mauricio Lastres, Melissa Chiarella, Wenzhi Li*, Qingmei Su, Gaohui Du, “Synthesis and field emission properties of vertically aligned carbon nanotube arrays on copper”, Carbon 50, 2641 (2012), DOI: 10.1016/j.carbon.2012.02.024